
This happened a long, long time ago. There was a world covered in thick dark clouds. But people from far-away lands came. They were treated like gods, and rid the world of the dark clouds. The ground overflowed with light, and new life sprouted. Trees. Animals. Fish. Birds. The gods had changed it all. But there were people who instead embraced the darkness. They were sent down, to the centre of the world, to a place called "Est". The rest united for a place called "Kaerum". Over time, the two words grew apart and a name was given to the boundary line... "Horizon..."
Horizon no Ue ~Yogen no Sho~ is a Japanese visual novel of 307,624 characters, with 9,434 unique words and 1,730 different kanji. Its difficulty rating on Jiten is hard, 3.0 out of 5. The full vocabulary list ranks all 9,434 words by how often they appear, and you can study them on Jiten or download them as an Anki deck.
Here are some of the words that appear most often in this media, as well as a sample of its rarer vocabulary.